Granted Patent B2

US 12,724,240 · App. 18/569,925 · Granted Sep 1, 2026

Inventor: Doo Shik Sin (Seoul, KR)

Assignee: LG INNOTEK CO., LTD.

G02B13/0045G02B9/64G02B13/0055H04N23/55

Abstract

Claims (187)

1 . An optical system comprising:

first to ninth lenses disposed along an optical axis in a direction from an object side to a sensor side,

wherein the first lens has a positive (+) refractive power on the optical axis,

wherein the second lens has a positive (+) refractive power on the optical axis,

wherein the third lens has a negative (−) refractive power on the optical axis,

wherein the fifth lens has a positive (+) refractive power on the optical axis,

wherein the ninth lens has a negative (−) refractive power on the optical axis,

wherein the fifth lens has a meniscus shape convex toward the sensor side on the optical axis,

wherein an object-side surface of the sixth lens has a convex shape on the optical axis,

wherein a sensor-side surface of the seventh lens has a concave shape on the optical axis,

L1_CT is a thickness of the first lens in the optical axis,

L3_CT is a thickness of the third lens in the optical axis,

wherein the optical system satisfies the following Equation:

2

<

L1_CT

/

L3_CT

<

4

;

d67_CT means a distance between a sensor-side surface of the sixth lens and an object-side surface of the seventh lens in the optical axis,

d78_CT means a distance between the sensor-side surface of the seventh lens and an object-side surface of the eighth lens in the optical axis, and

wherein the optical system satisfies the following Equation:

0.05

<

d67_CT

/

d78_CT

<

1.

2 . The optical system of claim 1 ,

wherein the first lens has a meniscus shape convex toward the object side on the optical axis,

wherein a thickness of the second lens in the optical axis is L2_CT,

wherein the optical system satisfies the following Equation:

1

<

L2_CT

/

L3_CT

<

2.5

.

Equation

3 . The optical system of claim 1 ,

wherein a refractive index of the third lens is greater than 1.6.

4 . The optical system of claim 1 ,

wherein the second lens, the fourth lens, and the sixth lens have a positive (+) refractive power.

5 . The optical system of claim 1 ,

L1_ET is a between an end of an effective region of the object-side surface of the first lens and an end of an effective region of a sensor-side surface of the first lens in a direction of the optical axis, and

wherein the following equation satisfies:

0

<

L1_ET

/

L1_CT

<

1.

Equation

6 . An optical system comprising:

first to ninth lenses disposed along an optical axis in a direction from an object side to a sensor side,

wherein the first lens has a positive (+) refractive power on the optical axis,

wherein the second lens has a positive (+) refractive power on the optical axis,

wherein the third lens has a negative (−) refractive power on the optical axis,

wherein the fifth lens has a positive (+) refractive power on the optical axis,

wherein the sixth lens has a positive (+) refractive power,

wherein the ninth lens has a negative (−) refractive power on the optical axis,

wherein an object-side surface of the sixth lens has a convex shape on the optical axis,

wherein a sensor-side surface of the seventh lens has a concave shape on the optical axis,

wherein a sensor-side surface of the ninth lens includes a critical point,

wherein the critical point of the ninth lens is disposed in a range of 30% to 70% of an effective radius of the sensor-side surface of the ninth lens with respect to the optical axis,

d67_CT means a distance between a sensor-side surface of the sixth lens and an object-side surface of the seventh lens in the optical axis,

d78_CT means a distance between the sensor-side surface of the seventh lens and an object-side surface of the eighth lens in the optical axis, and

wherein the optical system satisfies the following Equation:

0.05

<

d67_CT

/

d78_CT

<

1.

7 . The optical system of claim 6 ,

wherein an object-side surface of the first lens has a convex shape on the optical axis,

CA_L1S1 is an effective diameter of the object-side surface of the first lens,

CA_L3S2 is an effective diameter of the sensor-side surface of the third lens,

wherein the following equation satisfies:

1

<

CA_L1S1

/

CA_L3S2

<

2.

Equation

8 . The optical system of claim 6 ,

CA_L4S2 is an effective diameter of a sensor-side surface of the fourth lens,

CA_L9S2 is an effective diameter of the sensor-side surface of the ninth lens,

wherein the following equation satisfies:

1

<

CA_L9S2

/

CA_L4S2

<

5.

Equation

9 . The optical system of claim 6 ,

wherein a sensor-side surface of the eighth lens includes a critical point,

wherein the critical point of the eighth lens is disposed at 80% or less of an effective radius of the sensor-side surface of the eighth lens with respect to the optical axis.

10 . The optical system of claim 9 ,

wherein the seventh lens has a meniscus shape convex toward the object side on the optical axis, and

wherein a refractive index of the seventh lens is greater than or equal to a refractive index of the eighth lens.

11 . An optical system comprising:

first to ninth lenses disposed along an optical axis in a direction from an object side to a sensor side,

wherein the first lens has a positive (+) refractive power on the optical axis,

wherein the second lens has a positive (+) refractive power on the optical axis,

wherein the third lens has a negative (−) refractive power on the optical axis,

wherein the fifth lens has a positive (+) refractive power on the optical axis,

wherein the ninth lens has a negative (−) refractive power on the optical axis,

wherein an object-side surface of the sixth lens has a convex shape on the optical axis,

wherein a sensor-side surface of the seventh lens has a concave shape on the optical axis,

wherein a distance in a direction of the optical axis between the first and second lenses decreases from the optical axis toward a direction perpendicular to the optical axis,

d67_CT means a distance between a sensor-side surface of the sixth lens and an object-side surface of the seventh lens in the optical axis,

d78_CT means a distance between the sensor-side surface of the seventh lens and an object-side surface of the eighth lens in the optical axis, and

wherein the optical system satisfies the following Equation:

0.05

<

d67_CT

/

d78_CT

<

1.

12 . The optical system of claim 11 ,

wherein a sensor-side surface of the second lens has a concave shape on the optical axis,

d12_CT means a distance between a sensor-side surface of the first lens and an object-side surface of the second lens in the optical axis,

d12_ET means a distance between an end of an effective region of the sensor-side surface of the first lens and an end of an effective region of the object-side surface of the second lens in a direction of the optical axis, and

wherein the following equation satisfies:

1.5

<

d12_CT

/

d12_ET

<

3.

Equation

13 . The optical system of claim 11 ,

wherein the second lens has a meniscus shape convex toward the object side on the optical axis,

wherein a distance in a direction of the optical axis between the second and third lenses increases from the optical axis toward the direction perpendicular to the optical axis,

wherein a thickness of the second lens in the optical axis is L2_CT,

wherein a thickness of the third lens in the optical axis is L3_CT, and

wherein the optical system satisfies the following Equation:

1

<

L2_CT

/

L3_CT

<

2.5

.

14 . The optical system of claim 13 ,

d23_CT means a distance between a sensor-side surface of the second lens and an object-side surface of the third lens in the optical axis,

d23_ET means a distance between an end of an effective region of a sensor-side surface of the second lens and an end of an effective region of the object-side surface of the third lens in the direction of the optical axis, and

wherein the following equation satisfies:

0.1

<

d23_CT

/

d23_ET

<

1.

15 . The optical system of claim 11 ,

wherein a distance in a direction of the optical axis between the eighth and ninth lenses increases from the optical axis toward a seventh point located on a sensor-side surface of the eighth lens, decreases from the seventh point to an eighth point located on the sensor-side surface of the eighth lens, and decreases from the eighth point to a ninth point located on the sensor-side surface of the eighth lens,

wherein the eighth point is disposed more outside than the seventh point with respect to the optical axis, and

wherein the ninth point is disposed more outside than the eighth point with respect to the optical axis and is an end of an effective region of the sensor-side surface of the eighth lens.

16 . The optical system of claim 11 ,

wherein the sixth lens has a positive (+) refractive power.

17 . The optical system of claim 11 ,

wherein an object-side surface of the first lens has a convex shape on the optical axis.

18 . The optical system of claim 17 ,

wherein an object-side surface of the fourth lens has a convex shape on the optical axis, and

wherein a sensor-side surface of the fourth lens has a convex shape on the optical axis.

19 . The optical system of claim 1 ,

wherein a sensor-side surface of the second lens has a concave shape on the optical axis, and

wherein an object-side surface of the seventh lens has a convex shape on the optical axis.

20 . The optical system of claim 1 ,

wherein an object-side surface of the fourth lens has a convex shape on the optical axis, and

wherein a sensor-side surface of the fourth lens has a convex shape on the optical axis.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (20)